This question is much to broad to answer. As with the gun itself "best" depends on intended use, and user preference.
The value of a Colt AR-15 with a Colt scope can vary significantly based on factors such as the model, condition, included accessories, and market demand. Generally, a Colt AR-15 can range from $800 to over $1,500, while a Colt scope may add an additional $100 to $300. For the most accurate valuation, it's best to consult recent sales data or local listings.
yes
Bushnell
well the standard ar-15 is a colt. but now these days the most poopular are generally either DPMS or Bushmaster. the best of the Best is Barret and LWRC.
Buy the best barrel you can afford.
catching fire is 17 ar points and mockingjay is 15 i think :)
Colt - would be your best bet if you want a name brand - and something reliable.
The AR-15 was created by a design team led by Eugene Stoner. Initially, the AR-15 was intended to be a companion rifle to the AR-10; the AR-10 was intended to replace the M1 Garand while the AR-15 was intended to replace the M1, M2, and M3 carbines.
CMMG's "bargain bin" rifles.
The AR 15 is a rifle, not a caliber. the .223 is a caliber. Usually the AR-15 is made in caliber .223.
The M3 is the semi-automatic version of the Ar-15 (M4).
The Colt AR-15 rifle with Serial Number 100677 was manufactured in 1962. Colt's production of the AR-15 began in the early 1960s, and serial numbers from that period can be referenced to determine their manufacturing dates. For precise information, it’s best to consult Colt's official records or a reliable Colt AR-15 serial number database.